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  Indian J Med Microbiol
 

Figure 5 Endoscopic view after drilling the tubal process (TP) of tympanic bone to expose vertical petrous ICA (VpICA). The carotid foramen lies medial to styloid process (SP). Note the acute angle between VpICA and horizontal petrous ICA (HpICA). PP: petrous pyramid, BE: bony Eustachian tube, SS: spine of sphenoid, HC: Hypoglossal canal, FO; Foramen ovale.

Figure 5 Endoscopic view after drilling the tubal process (TP) of tympanic bone to expose vertical petrous ICA (VpICA). The carotid foramen lies medial to styloid process (SP). Note the acute angle between VpICA and horizontal petrous ICA (HpICA). PP: petrous pyramid, BE: bony Eustachian tube, SS: spine of sphenoid, HC: Hypoglossal canal, FO; Foramen ovale.